Pith Number

pith:4MFR2X4S

pith:2013:4MFR2X4SHRJAGY465TZIEJEMMG

not attested not anchored not stored refs pending

Structural Tractability of Counting of Solutions to Conjunctive Queries

Arnaud Durand, Stefan Mengel

arxiv:1303.2059 v1 · 2013-03-08 · cs.LO

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{4MFR2X4SHRJAGY465TZIEJEMMG}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-05-18T03:31:31.518407Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e30b1d5f923c5203639eecf282248c6186e18767ca2b6af76392d015a82655e3

Aliases

arxiv: 1303.2059 · arxiv_version: 1303.2059v1 · doi: 10.48550/arxiv.1303.2059 · pith_short_12: 4MFR2X4SHRJA · pith_short_16: 4MFR2X4SHRJAGY46 · pith_short_8: 4MFR2X4S

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/4MFR2X4SHRJAGY465TZIEJEMMG \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: e30b1d5f923c5203639eecf282248c6186e18767ca2b6af76392d015a82655e3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c4ce9bc018fcce9270cacd422a289c361b3a7def370ee3e618ebfbdb1eee5025",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LO",
    "submitted_at": "2013-03-08T17:24:34Z",
    "title_canon_sha256": "a698c67191985380b188af2d50da613bfed3b7671036cb43bde7288421243a3c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1303.2059",
    "kind": "arxiv",
    "version": 1
  }
}